Abstract
Due lo alkaline and calcareous nature of Pakistani soils most of the native and applied phosphorus becomes unavailable to the growing plants (Sharif. 1985). The low availability is because of its fixation either on colloidal complex or formation of sparingly soluble compounds such as carbonate-apatite, hydroxy-apatite and flour-apatite. Am measure which helps reducing the activity of calcium would ensure the enhanced availability of phosphorus to plants and thereby leads to increased fertilizer use efficiency. The efficient use of phosphate fertilizer also depends on rate. time, method of application and crops requirements. Organic manuring enhances the fertilizer consisting of top 15 cm was collected from rice tract of Shcikhupura. The soil was air dried, ground and passed through 2 mm sieve. A representative soil sample was analysed for pfL ECo. anions. cations, organic matter. (Richards. 1954). Kjeldahl-N (Bremncr. 1965). Extractable-P (Watanabc and Olscn. 1965) and texture (Moodie et. al., 1965). Soil was deficient in nitrogen, phosphorus and organic ma
M. Jamil*, f/iikhar Ahmad**., M. Aslam**, M. Ishaq* . (1994) PHOSPHORUS FERTILIZATION TO RICE AS INFLUENCED BY FARM YARD MANURE , The Journal Soil & Environment , Volume 9, Issue (1-2).
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